Shear check of walls

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Shear check of walls

The check of seismic wall shear force (amplified automatically by the program) are performed according to EC2/EC8 rules assuming as inner lever arm equal to 80% of the width of the section, except in the case of the walls in ductility class DCH for which the shear strength compression VRd,max should be reduced by 60% and assuming cotϑ = 1 (what makes difficult the conformity of shear check for these walls in high ductility class. We recommend for seismic walls to adopt the ductility class DCM.
Sliding shear check is provided in EC8 only for walls in ductile class DCH (§ 5.5.3.4.4). The program does not provide for the presence of inclined bars at the base of the wall in the last mentioned check.
In ductility class DCH wall should also be verified for diagonal tension failure (§ 5.5.3.4.3 EC8).
The considerable number of checks and parameters entails, for ductile walls, the need to iterate the verifications by changing from time to time the reinforcement. To this end, we recommend to print at each step the full results (also on the screen) in which they are exposed eventual non-conforming values with reference to the standards requirements.